Surgical mask



FIG. 1 is a front elevational view of a surgical mask showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a top perspective view thereof.

The broken lines in the drawings illustrate portions of the surgical mask that form no part of the claimed design. 

CLAIM The ornamental design for a surgical mask, as shown and described. 